package com.atguigu.redis.single;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class ShareData{
    private int number =0;
    private Lock lock = new ReentrantLock();
    private Condition condition = lock.newCondition();

    public void increment() throws Exception{
        lock.lock();
        try {
        //1  判断
        while (number!=0){
            //等待，不能生产
            condition.await();
        }
        number++;
        System.out.println(Thread.currentThread().getName()+"\t"+number);
        condition.signalAll();
        }catch (Exception e){

        }finally {
            lock.unlock();
        }

    }
    public void decrement() throws Exception{
        lock.lock();
        try {
            //1  判断
            while (number==0){
                //等待，不能生产
                condition.await();
            }
            number--;
            System.out.println(Thread.currentThread().getName()+"\t"+number);
            condition.signalAll();
        }catch (Exception e){

        }finally {
            lock.unlock();
        }

    }
}

/**
 * 题目
 * 1 线程  操作  资源类
 * 2 判断 干活  通知
 * 3 防止虚假唤醒
 */
public class ProdConsumer_TraditionDemo {
    public static void main(String[] args) {
        ShareData shareData = new ShareData();
        new Thread(()->{
            for (int i = 0; i < 5; i++) {
                try {
                    shareData.increment();
                }catch (Exception e){

                }
            }

        },"AA").start();
        new Thread(()->{
            for (int i = 0; i < 5; i++) {
                try {
                    shareData.decrement();
                }catch (Exception e){

                }
            }

        },"BB").start();
    }
}
